Roof drain



FIG. 1 is a top perspective view of a roof drain, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevational view of one side thereof, the other sides being the same as the side shown;

FIG. 4 is a bottom plan view; and,

FIG. 5 is a cross-sectional view taken along line 5--5 of FIG. 2. 

The ornamental design for a roof drain, as shown and described. 